Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSINFINITI2019Q70 3.7 LUXE, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 2 (ENGINE CONTROL SYSTEM (5.6L) (DTC/CIRCUIT DIAGNOSIS) (2 OF 9))DTC/CIRCUIT DIAGNOSISDTC P0125: ECT SENSORCOMPONENT INSPECTION (ENGINE COOLANT TEMPERATURE SENSOR)
2019 Infiniti Q70 3.7 Luxe, AWD
Component Inspection (Engine Coolant Temperature Sensor)
2019 Infiniti Q70 3.7 Luxe, AWDSECTION Component Inspection (Engine Coolant Temperature Sensor)
WARNING: This page is about a different variant/trim than selected.
- CHECK ENGINE COOLANT TEMPERATURE (ECT) SENSOR
- Turn ignition switch OFF.
- Disconnect ECT sensor harness connector.
- Remove ECT sensor. Refer to Exploded View .
- Check resistance between ECT sensor terminals by heating with hot water as shown in the figure.
Terminals
Condition
Resistance (kOhm)
1 and 2
Temperature [ deg.C (deg.F)]
20 (68)
2.1 - 2.9
50 (122)
0.68 - 1.00
90 (194)
0.236 - 0.260
Is the inspection result normal?
YES
INSPECTION END
NO
Replace ECT sensor. Refer to Exploded View .
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.